Animal Systematics, Evolution and Diversity

The Korean Society of Systematic Zoology (한국동물분류학회)
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Carcinothoe haustra n. gen. n. sp. (Copepoda, Siphonostomatoida, Nicothoidae) Parasitic on the Crab Portunus sanguinolentus from Korea

  • Jimin Lee (Ocean Climate Response.Ecosystem Research Department, Korea Institute of Ocean Science & Technology) ;
  • Il-Hoi Kim (Korea Institute of Coastal Ecology)
  • Received : 2024.08.13
  • Accepted : 2024.10.15
  • Published : 2024.10.31
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Abstract

Carcinothoe haustra n. gen. n. sp. feeding on eggs of the three-spotted swimming crab Portunus sanguinolentus is described from Korean waters. Choniosphaera indica Gnanamuthu, 1954, which was previously described as copepod parasitic on the same species of the crab from India, is transferred to Carcinothoe n. gen. As two significant synapomorphic features in the female of the new genus, the antennule is 5-segmented and the caudal ramus is transformed into an elongate stylet. As other diagnostic features in the female of the new genus, the body is elliptical, unsegmented, and slightly compressed laterally, the urosome is completely fused with the prosome, the caudal rami are fused with abdominal region, the genital region is positioned on the ventral surface and partly covered with a pair of genital plates, the antenna is 4-segmented with two denticulate spines distally, the maxillule bears two setae on the precoxal endite and three apical setae on the unsegmented palp, the maxilla is 2-segmented, and the maxilliped is 4-segmented and tipped with a denticulate spine. Carcinothoe haustra n. gen. n. sp. differs from C. indica n. comb. in having an anteroventrally protruded buccal region, the antennule which is remotely separated from the buccal region, and no legs.

Keywords

Acknowledgement

This work was supported by the management of Marine Fishery Bio-resources Center(2024) funded by the National Marine Biodiversity Institute of Korea (MABIK), Seocheon and by the research program of KIOST(Contract No. PEA0205).

References

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